# Glencoe Physics Chapter 14

Period
Time needed for an object to complete one full cycle

Node
More than one wave that moves through the same medium and time

Interference
Any point that does not experience displacement

Wave
Disturbance that carries energy through matter

Logitudinal Wave
Wave in which the disturbance is parallel to the direction travel

Amplitude
Maximum distance an object in harmonic motion moves from equilibrium

Trough
Lowest point of a transverse wave

Wavelength
Shortest distance between two points where wave repeats

Periodic Motion
Motion that repeats in a cycle

Antinode
When two waves interfere at the point of greatest displacement

Transverse Wave
Travels in a direction perpindicular to its displacement

Frequency
Number of oscillations a wave makes each second

Refraction
Refers to the change in direction waves experience at the boundary between two different media

Crest
The highest point in a wave

simple harmonic
the back forth vibratory motion of a swinging pendulum

law of reflection
the angle of incidence is equal to the angle of reflection

pendulum
something that hangs and swings back and forth

incident wave
A wave that strikes the boundary between two media

ray
a straight line extending from a point

reflected wave
wave that bounces back from a barrier

resonance
having the character of a loud deep sound

standing wave
a wave that appears to stand in one place, even though it is really two waves interfering as they pass through each other

superposition
the placement of one thing on top of another

surface wave
A wave that occurs at the surface between two mediums

wave front
all the points just reached by a wave as it propagates

wave pulse
a single disturbance or pulse that travels through a medium